Supplementary handle for tools



w. w. BOOTH. SUPPLEMENTARY HANDLE FOR TOOLS;

APPLICATION FILED JUNE I, 1920.

1',391,4-52, PatentedS ept. 20, 1921.

PTATENT OFFICE.

wrnnrnm w. BOOTH, or TOLED-O, 1 o-E-Io.

surrLnnEiwARYnANDnE on roots.

T o allwhom it may concern:

Be it known that'I, WILLIAM W. Boo'rrr, a citizen of the United States of America, residing at Toledo, Lucas county, Ohio, have invented new and useful Supplementary Handles for Tools, of which the following is a specification.

This invention relates to features of handles for tools.

This invention has utility as a supplementary handle for manually actuated tools driven for rotation by direct pressure, as drills, and more particularly screw drivers.

Referring to the drawin i Figure 1 is aside elevatlon of an embodiment of the invention in connection with a pressure rotated hand'tool, the instance being of an automatic screw driver known as Y ,v

Fig. 2 is a plan view of the transverse bar of grip member of the supplementary handle;

Fig. 3 is a perspective view, from the grounting side, of the bar or member of Fig. 4 is a perspective view of the normal handle embracing ferrule, which serves to bring and hold the bar or member in assembled anchoring position as to the normal handle; and

Fig. 5 is a section of the detachable supplementary handle in assembled position on a tool handle.

In the instance of the Yankee automatic screw driver herein shown, there is the rotatably actuated tool 1 detachably held by chuck 2 for rotation with helically grooved stem 3 normally thrust by spring 4 for rotation in moving out of stock 5. This stock 5 has fixedly mounted thereon, remote from the screw driving tool 1, a normal handle 6 having a terminal bulge 7 as a grip for usual tool operations.

For rapid and. continuous work, especially, with large screws, or in woods ofi'ering considerable resistance or friction to setting of the screws, the normal handle is extremely wearing and fatiguing upon the worker, as compared with advantages for holding and pressure impelling contributed by the supplementary handle of the invention herein. While in some minor or special work, the normal handle has its place, for which it is well to retain the tool normal handle, as herein provided; the especially arduous duties are very materially eased up Application filed June 1,

Specification of Letters Patent. Patented Sept. 20, 19 21.

1920. Serial No. 335,550.

by the su plementary handle of this disclosure. sual operation, with each handle is by holding against rotation, and applying pressure axially. v i V For lightness, strength, and ready assembly without mutilation of the normal handle, there is disclosed herein an embodiment of the supplementary handle invention comprising a palm seat providing member or transverse bar embodying a cap or top portion 8, opposing which is a second sheet metal portion 9 having brazed joint 10 in assembly with the portion 8 in completing one element and the su plementary handle portion ofthe device. he under or second portion 9 has centrally'protruding therefrom a collar or flange 11 provided with internal threads 13 throughout; About the central, slightly arched portion 13 maybe inwardly struck lugs 14. The arched portion 13 on the inner side provides a seat for engaging the terminal of the tool normal handle, and in some instances supplemental lugs 14 may not be necessary to hold the transverse bar 8, 9, against rotation as to the handle 6, 7. In the Yankee screw driver, the assembly of the spring 4 in the gri 6, 7, results in a terminal screw which is c eared by the lugs 14 being eccentric so. such lugs mayembed in the wooden bulge 7 Of a size precluding assembly over the handle 6, 7, toward the tool, there is provided a ferrule 15 having tapered form with an external thread 16, on the enlarged portion running out toward the reduced portion. Thereduced portion of this ferrule 15 has provision for ready finger engagement in effecting rotation, herein shown as knurled portion 17. This ferrule 15 is assembled by moving from the tool 1, over the handle 5, to be drawn up on the inner taper of the bulge 7 as the threads 16 coact with the threads 12. There is thus simply accomplished an assembly and simultaneous anchoring with no multilation, a supplementary handle readily discarded. The palm fitting contour of the transverse bar affords easy mechanical advantage in holding the tool handles against rotation as the pressure impels too-l rotation in driving a screw. Furthermore, asthe supplementary handle is axially fixed in both directions with the primary handle 6, 7, screw withdrawal may also be brought about in the use of this supplementary handle.

The current configuration for normal han- 'dlesas disposed axially of tools, in many instances has not material-variation. In fact as between some different sizes of Yankee automatic Screw drivers, the handle variause is one requiring no too-ls, and convenient to' any tool user, by running up the ferrule by engaging the knurled; portion ,17 and holding the bar ormember 8, 9. Such assembly, only by hand, is ample to withstand even extended tool use without supplemental l 1. A supplementary handle for a tool protightening. For removal, merereverse rotation" of the ferrule as to thebar brings about severingof the two members. i

' What is claimedandit is desired to secure by Letters Patent'is:

vided with a coaxial terminally bulged grip, said handle embodyinq a transverse bar, and a grip engaging ferrule to mount the ,bar on a I the grip.

2. A supplementary handle for a tool pro vided with a' coaxial terminally bulgedgrip,

said handle embodying a transverse bar provided with an internally threaded collar,

and a grip engaging externally threaded fer rule to anchor the bar on the grip by threading into thecollar of thebar.

3. A supplementary handle for a tool provided with a coaxial terminally bulged grip, said handle embodying a transverse bar provided with a protruding internally threaded collar, and a grip engaging ferrule having threads, said ferrule movable along the grip from the tool toward the bulge'as the threads of-the ferrule coact with the threaded collar I of the bar in anchoringthe-ba-r to the grip,

4. An automatic screwdriver provided with. a normal terminal-pressure applying handle, anda supplementary. handle there for comprising a transverse bar,' and means for detachably anchoring the bar to house the pressure applying end of the handle for driving and withdrawalactua'tions.

5. An automatic screw :driver provided; with a normalhandle, anda supplementary handle therefor comprising i a sheet, metal member having. a threaded collar for en veloping the normal handle, by assembly thereon remote fromthetoohtoward the tool,-

and a ferrule mountable upon such normal. handle fromthe opposite direction and en gaging the member to anchor the member to the normalhandle and; thereby-{assemble t the supplementary, handle in position;

In witness whereof Iafiix my signature. J

v WILLIAM BOOTH. 

